108956191 has 2 divisors, whose sum is σ = 108956192. Its totient is φ = 108956190.

The previous prime is 108956171. The next prime is 108956201. The reversal of 108956191 is 191659801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 108956191 - 2¹¹ = 108954143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108956131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54478095 + 54478096.

It is an arithmetic number, because the mean of its divisors is an integer number (54478096).

Almost surely, 2^108956191 is an apocalyptic number.

108956191 is a deficient number, since it is larger than the sum of its proper divisors (1).

108956191 is an equidigital number, since it uses as much as digits as its factorization.

108956191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 40.

The square root of 108956191 is about 10438.2082274689. The cubic root of 108956191 is about 477.6216128023.

The spelling of 108956191 in words is "one hundred eight million, nine hundred fifty-six thousand, one hundred ninety-one".